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Related Concept Videos

Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Cellular Differentiation00:57

Cellular Differentiation

How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...
Forced Transdifferentiation01:28

Forced Transdifferentiation

Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
Artificial transdifferentiation occurs...
Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:
The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.

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Related Experiment Video

Updated: Jun 17, 2026

Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
06:30

Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM

Published on: March 2, 2017

Binary fate decisions in differentiating neurons.

David Jukam1, Claude Desplan

  • 1Center for Developmental Genetics, Department of Biology, New York University, 100 Washington Square East, New York, NY 10003, USA.

Current Opinion in Neurobiology
|December 22, 2009
PubMed
Summary
This summary is machine-generated.

Developing diverse neurons is crucial for nervous system function. This review explores how binary cell fate decisions generate distinct neuronal subtypes using various mechanisms across species.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Nervous system development requires generating numerous neurons with specific adult functions.
  • Neuronal diversity is achieved through various strategies, including binary fate decisions.
  • Understanding the genetic programs defining neuronal identity is an active area of research.

Purpose of the Study:

  • To review mechanisms controlling binary neuronal fate decisions.
  • To explore how these decisions generate distinct postmitotic neuronal subtypes.
  • To compare strategies used in different model organisms.

Main Methods:

  • Literature review of studies on neuronal fate specification.
  • Survey of examples from Caenorhabditis elegans and Drosophila.
  • Analysis of mechanisms including cell division, lineage, stochastic gene expression, and extracellular signals.

Main Results:

  • Binary neuronal fate decisions are a key mechanism for diversifying neuronal subtypes.
  • Diverse strategies are employed, including lineage-dependent and independent pathways.
  • Stochastic gene expression and extracellular signals play significant roles in fate determination.

Conclusions:

  • Organisms utilize diverse yet convergent strategies for neural diversity.
  • Common themes exist in binary neuronal fate specification across species.
  • Further research can elucidate conserved principles in neural development.